Question

Sum of the 5th term and 24th term of an AP Is 50.when Find the sum of the 28th term??? ​

Answer 1

Step-by-step explanation:

(a+4d)+(a+23d)=50

2a+27d=50

now,

s28=28/2{2a+(28-1)d}

s28=14{2(50-27d)+27d}

s28=14(50-27d+27d)

s28=14×50

s28=700